1 /**
2 * @file lv_draw_vglite_triangle.c
3 *
4 */
5
6 /**
7 * Copyright 2023-2024 NXP
8 *
9 * SPDX-License-Identifier: MIT
10 */
11
12 /*********************
13 * INCLUDES
14 *********************/
15
16 #include "lv_draw_vglite.h"
17
18 #if LV_USE_DRAW_VGLITE
19 #include "lv_vglite_buf.h"
20 #include "lv_vglite_path.h"
21 #include "lv_vglite_utils.h"
22
23 #include "../../../stdlib/lv_string.h"
24
25 /*********************
26 * DEFINES
27 *********************/
28
29 /**********************
30 * TYPEDEFS
31 **********************/
32
33 /**********************
34 * STATIC PROTOTYPES
35 **********************/
36
37 /**
38 * Draw triangle shape with effects (opacity, gradient)
39 *
40 * @param[in] coords Coordinates of the triangle (relative to dest buff)
41 * @param[in] clip_area Clipping area with relative coordinates to dest buff
42 * @param[in] dsc Description of the triangle
43 *
44 */
45 static void _vglite_draw_triangle(const lv_area_t * coords, const lv_area_t * clip_area,
46 const lv_draw_triangle_dsc_t * dsc);
47
48 /**********************
49 * STATIC VARIABLES
50 **********************/
51
52 /**********************
53 * MACROS
54 **********************/
55
56 /**********************
57 * GLOBAL FUNCTIONS
58 **********************/
59
lv_draw_vglite_triangle(lv_draw_unit_t * draw_unit,const lv_draw_triangle_dsc_t * dsc)60 void lv_draw_vglite_triangle(lv_draw_unit_t * draw_unit, const lv_draw_triangle_dsc_t * dsc)
61 {
62 if(dsc->bg_opa <= (lv_opa_t)LV_OPA_MIN)
63 return;
64
65 lv_layer_t * layer = draw_unit->target_layer;
66 lv_area_t clip_area;
67 lv_area_copy(&clip_area, draw_unit->clip_area);
68 lv_area_move(&clip_area, -layer->buf_area.x1, -layer->buf_area.y1);
69
70 lv_area_t coords;
71 coords.x1 = (int32_t)LV_MIN3(dsc->p[0].x, dsc->p[1].x, dsc->p[2].x);
72 coords.y1 = (int32_t)LV_MIN3(dsc->p[0].y, dsc->p[1].y, dsc->p[2].y);
73 coords.x2 = (int32_t)LV_MAX3(dsc->p[0].x, dsc->p[1].x, dsc->p[2].x);
74 coords.y2 = (int32_t)LV_MAX3(dsc->p[0].y, dsc->p[1].y, dsc->p[2].y);
75
76 lv_area_move(&coords, -layer->buf_area.x1, -layer->buf_area.y1);
77
78 lv_area_t clipped_coords;
79 if(!lv_area_intersect(&clipped_coords, &coords, &clip_area))
80 return; /* Fully clipped, nothing to do */
81
82 _vglite_draw_triangle(&coords, &clip_area, dsc);
83 }
84
85 /**********************
86 * STATIC FUNCTIONS
87 **********************/
88
_vglite_draw_triangle(const lv_area_t * coords,const lv_area_t * clip_area,const lv_draw_triangle_dsc_t * dsc)89 static void _vglite_draw_triangle(const lv_area_t * coords, const lv_area_t * clip_area,
90 const lv_draw_triangle_dsc_t * dsc)
91 {
92 vg_lite_buffer_t * vgbuf = vglite_get_dest_buf();
93
94 lv_area_t tri_area;
95 tri_area.x1 = (int32_t)LV_MIN3(dsc->p[0].x, dsc->p[1].x, dsc->p[2].x);
96 tri_area.y1 = (int32_t)LV_MIN3(dsc->p[0].y, dsc->p[1].y, dsc->p[2].y);
97 tri_area.x2 = (int32_t)LV_MAX3(dsc->p[0].x, dsc->p[1].x, dsc->p[2].x);
98 tri_area.y2 = (int32_t)LV_MAX3(dsc->p[0].y, dsc->p[1].y, dsc->p[2].y);
99
100 uint32_t width = lv_area_get_width(&tri_area);
101 uint32_t height = lv_area_get_height(&tri_area);
102
103 /* Init path */
104 int32_t triangle_path[] = { /*VG line path*/
105 VLC_OP_MOVE, dsc->p[0].x, dsc->p[0].y,
106 VLC_OP_LINE, dsc->p[1].x, dsc->p[1].y,
107 VLC_OP_LINE, dsc->p[2].x, dsc->p[2].y,
108 VLC_OP_LINE, dsc->p[0].x, dsc->p[0].y,
109 VLC_OP_END
110 };
111
112 vg_lite_path_t path;
113 VGLITE_CHECK_ERROR(vg_lite_init_path(&path, VG_LITE_S32, VG_LITE_HIGH, sizeof(triangle_path), triangle_path,
114 (vg_lite_float_t)clip_area->x1, (vg_lite_float_t)clip_area->y1,
115 ((vg_lite_float_t)clip_area->x2) + 1.0f, ((vg_lite_float_t)clip_area->y2) + 1.0f));
116
117 /* Init Color */
118 lv_color32_t col32 = lv_color_to_32(dsc->bg_color, dsc->bg_opa);
119 vg_lite_color_t vgcol = vglite_get_color(col32, false);
120
121 vg_lite_linear_gradient_t gradient;
122 bool has_gradient = (dsc->bg_grad.dir != (lv_grad_dir_t)LV_GRAD_DIR_NONE);
123
124 /* Init Gradient*/
125 if(has_gradient) {
126 vg_lite_matrix_t * grad_matrix;
127
128 vg_lite_uint32_t colors[LV_GRADIENT_MAX_STOPS];
129 vg_lite_uint32_t stops[LV_GRADIENT_MAX_STOPS];
130 lv_color32_t col32[LV_GRADIENT_MAX_STOPS];
131
132 /* Gradient Setup */
133 vg_lite_uint32_t cnt = LV_MAX(dsc->bg_grad.stops_count, LV_GRADIENT_MAX_STOPS);
134 lv_opa_t bg_opa;
135
136 for(uint8_t i = 0; i < cnt; i++) {
137 stops[i] = dsc->bg_grad.stops[i].frac;
138 bg_opa = LV_OPA_MIX2(dsc->bg_grad.stops[i].opa, dsc->bg_opa);
139
140 col32[i] = lv_color_to_32(dsc->bg_grad.stops[i].color, bg_opa);
141 colors[i] = vglite_get_color(col32[i], true);
142 }
143
144 lv_memzero(&gradient, sizeof(vg_lite_linear_gradient_t));
145
146 VGLITE_CHECK_ERROR(vg_lite_init_grad(&gradient));
147
148 VGLITE_CHECK_ERROR(vg_lite_set_grad(&gradient, cnt, colors, stops));
149
150 VGLITE_CHECK_ERROR(vg_lite_update_grad(&gradient));
151
152 grad_matrix = vg_lite_get_grad_matrix(&gradient);
153 vg_lite_identity(grad_matrix);
154 vg_lite_translate((float)coords->x1, (float)coords->y1, grad_matrix);
155
156 if(dsc->bg_grad.dir == (lv_grad_dir_t)LV_GRAD_DIR_VER) {
157 vg_lite_scale(1.0f, (float)height / 256.0f, grad_matrix);
158 vg_lite_rotate(90.0f, grad_matrix);
159 }
160 else { /*LV_GRAD_DIR_HOR*/
161 vg_lite_scale((float)width / 256.0f, 1.0f, grad_matrix);
162 }
163
164 VGLITE_CHECK_ERROR(vg_lite_draw_gradient(vgbuf, &path, VG_LITE_FILL_EVEN_ODD, NULL, &gradient,
165 VG_LITE_BLEND_SRC_OVER));
166 }
167 else {
168 VGLITE_CHECK_ERROR(vg_lite_draw(vgbuf, &path, VG_LITE_FILL_EVEN_ODD, NULL, VG_LITE_BLEND_SRC_OVER, vgcol));
169 }
170
171 vglite_run();
172
173 VGLITE_CHECK_ERROR(vg_lite_clear_path(&path));
174
175 if(has_gradient)
176 VGLITE_CHECK_ERROR(vg_lite_clear_grad(&gradient));
177 }
178
179 #endif /*LV_USE_DRAW_VGLITE*/
180
